Kisatchie Star Party
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Kisatchie Star Party clear sky chart from 2005-11-06 to 2024-11-05.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	12% 7% 3 6% 5% 5% 5% 4 6% 7% 41%	100931
	Night	12% 7% 2 6% 4 4 4 3 5% 7% 46%	98176
Transparency	Day	40% 7% 11% 19% 18% 6%	104577
	Night	35% 6% 12% 19% 19% 9%	102671
Seeing	Day	14% 8% 22% 25% 22% 8%	15033
	Night	15% 8% 25% 32% 18% 3	24797

By Month

Percentage Cloud Cover SE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	18% 9% 3 7% 4 3 3 3 4 5% 40%	2847
	11th to 20th	Day	18% 7% 2 5% 4 3 2 3 3 5% 47%	2850
	21st to end	Day	22% 9% 3 6% 4 2 3 2 4 6% 40%	3135
February	1st to 10th	Day	18% 9% 4 6% 5% 4 4 3 4 5% 38%	1710
	11th to 20th	Day	20% 9% 3 6% 5% 3 3 3 3 5% 41%	1851
	21st to end	Day	19% 8% 3 7% 5% 5% 4 3 4 5% 37%	1727
March	1st to 10th	Day	20% 13% 4 8% 5% 4 4 3 4 6% 30%	3436
	11th to 20th	Day	19% 8% 3 7% 5% 5% 4 4 7% 7% 33%	3480
	21st to end	Day	16% 11% 4 8% 5% 4 3 2 3 4 40%	3814
April	1st to 10th	Day	12% 8% 2 6% 5% 5% 5% 4 5% 6% 41%	2209
	11th to 20th	Day	17% 6% 3 6% 5% 4 4 3 5% 7% 40%	2254
	21st to end	Day	10% 7% 2 7% 5% 5% 5% 4 5% 7% 44%	2280
May	1st to 10th	Day	14% 8% 4 8% 6% 6% 5% 4 6% 7% 32%	3765
	11th to 20th	Day	12% 7% 3 5% 5% 4 4 3 6% 7% 44%	3875
	21st to end	Day	9% 5% 2 7% 5% 6% 5% 5% 7% 10% 37%	4477
June	1st to 10th	Day	7% 6% 2 6% 7% 6% 6% 6% 7% 8% 38%	2470
	11th to 20th	Day	6% 4 2 6% 7% 6% 7% 5% 8% 10% 39%	2470
	21st to end	Day	6% 5% 2 6% 6% 7% 8% 7% 8% 10% 34%	2470
July	1st to 10th	Day	8% 6% 3 9% 7% 6% 7% 5% 8% 10% 31%	4120
	11th to 20th	Day	8% 7% 3 8% 7% 7% 7% 6% 8% 10% 29%	4120
	21st to end	Day	16% 10% 3 9% 5% 5% 5% 4 6% 8% 27%	4465
August	1st to 10th	Day	2 2 1 4 4 4 4 4 6% 8% 60%	4042
	11th to 20th	Day	4 3 1 4 4 4 5% 4 8% 12% 51%	3729
	21st to end	Day	11% 5% 2 7% 5% 6% 6% 6% 6% 8% 38%	4180
September	1st to 10th	Day	9% 7% 2 7% 5% 6% 5% 5% 6% 7% 41%	2280
	11th to 20th	Day	14% 6% 2 5% 4 5% 6% 4 6% 8% 40%	2185
	21st to end	Day	11% 3 2 5% 4 4 5% 4 6% 7% 50%	2024
October	1st to 10th	Day	6% 5% 1 4 4 3 3 3 4 5% 60%	1900
	11th to 20th	Day	11% 5% 1 5% 3 4 3 3 5% 6% 55%	1900
	21st to end	Day	14% 6% 2 5% 4 3 3 3 3 5% 52%	2090
November	1st to 10th	Day	10% 6% 3 6% 4 4 3 4 4 5% 51%	1898
	11th to 20th	Day	12% 6% 2 6% 4 3 3 3 4 5% 52%	1900
	21st to end	Day	17% 7% 2 6% 4 3 4 4 4 5% 45%	1900
December	1st to 10th	Day	15% 8% 2 5% 4 4 4 4 4 6% 44%	1782
	11th to 20th	Day	15% 11% 3 6% 4 4 4 3 5% 6% 39%	2161
	21st to end	Day	16% 9% 3 7% 4 4 3 2 4 5% 42%	3135
January	1st to 10th	Night	15% 7% 3 6% 3 3 3 3 4 5% 48%	4108
	11th to 20th	Night	16% 7% 2 5% 3 3 3 3 3 4 51%	4120
	21st to end	Night	23% 11% 2 4 3 2 2 2 3 5% 41%	4532
February	1st to 10th	Night	15% 9% 3 6% 4 3 4 2 5% 6% 43%	2470
	11th to 20th	Night	21% 9% 2 5% 4 2 3 3 4 5% 44%	2227
	21st to end	Night	20% 9% 3 6% 3 3 4 3 4 6% 40%	1727
March	1st to 10th	Night	23% 11% 3 6% 4 4 4 3 4 7% 31%	3419
	11th to 20th	Night	19% 8% 2 7% 5% 4 4 3 5% 6% 35%	3480
	21st to end	Night	13% 7% 2 7% 4 4 4 4 5% 7% 42%	3817
April	1st to 10th	Night	11% 5% 2 5% 5% 4 4 4 6% 9% 45%	1971
	11th to 20th	Night	14% 7% 2 5% 4 4 5% 3 5% 6% 44%	1875
	21st to end	Night	9% 6% 2 5% 4 4 4 3 6% 6% 51%	1900
May	1st to 10th	Night	14% 8% 3 7% 5% 4 4 4 7% 9% 35%	3130
	11th to 20th	Night	14% 6% 2 6% 4 4 5% 4 5% 6% 44%	3018
	21st to end	Night	8% 6% 2 7% 4 5% 4 4 8% 12% 40%	3090
June	1st to 10th	Night	5% 4 2 6% 4 4 5% 4 6% 11% 48%	1710
	11th to 20th	Night	4 3 2 3 3 3 4 4 8% 11% 55%	1710
	21st to end	Night	6% 4 1 4 4 4 4 4 8% 12% 49%	1710
July	1st to 10th	Night	6% 5% 3 7% 5% 6% 5% 5% 8% 12% 39%	2850
	11th to 20th	Night	5% 5% 2 6% 5% 5% 6% 5% 9% 12% 38%	2850
	21st to end	Night	13% 8% 3 8% 5% 4 4 4 7% 9% 35%	3098
August	1st to 10th	Night	2 2 1 2 2 2 3 3 5% 11% 69%	2892
	11th to 20th	Night	2 3 1 4 3 3 5% 5% 8% 13% 52%	3100
	21st to end	Night	7% 6% 2 7% 5% 5% 5% 4 6% 8% 43%	3476
September	1st to 10th	Night	7% 5% 2 5% 4 5% 4 4 7% 8% 49%	1900
	11th to 20th	Night	12% 5% 2 7% 4 4 4 4 5% 7% 46%	1989
	21st to end	Night	9% 4 2 4 3 2 4 3 4 6% 58%	2137
October	1st to 10th	Night	6% 3 1 4 3 3 4 3 5% 6% 61%	2280
	11th to 20th	Night	9% 4 2 4 3 3 3 3 4 5% 58%	2280
	21st to end	Night	11% 4 1 5% 3 2 3 2 4 5% 59%	2508
November	1st to 10th	Night	10% 6% 2 5% 3 2 3 3 4 6% 56%	2280
	11th to 20th	Night	10% 5% 2 5% 4 4 4 3 5% 5% 53%	2280
	21st to end	Night	15% 7% 2 7% 4 4 4 4 4 5% 44%	2280
December	1st to 10th	Night	17% 8% 2 6% 3 3 3 3 5% 6% 43%	2394
	11th to 20th	Night	14% 10% 3 6% 3 4 4 3 4 5% 45%	3036
	21st to end	Night	16% 10% 2 5% 3 3 4 3 5% 5% 44%	4532

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	44% 5% 6% 17% 23% 5%	2848
	11th to 20th	Day	40% 5% 5% 20% 24% 6%	2850
	21st to end	Day	48% 4 4 14% 20% 9%	3135
February	1st to 10th	Day	49% 5% 6% 14% 17% 10%	1710
	11th to 20th	Day	48% 3 6% 15% 18% 9%	1861
	21st to end	Day	49% 5% 7% 11% 17% 11%	1727
March	1st to 10th	Day	56% 6% 7% 13% 14% 5%	3436
	11th to 20th	Day	47% 7% 8% 19% 15% 4	3480
	21st to end	Day	47% 5% 7% 15% 21% 4	3814
April	1st to 10th	Day	42% 7% 9% 19% 16% 8%	2209
	11th to 20th	Day	44% 5% 10% 16% 16% 9%	2254
	21st to end	Day	38% 7% 10% 19% 21% 5%	2280
May	1st to 10th	Day	48% 9% 10% 19% 10% 4	3800
	11th to 20th	Day	39% 6% 11% 19% 23% 2	3879
	21st to end	Day	39% 10% 15% 24% 10% 1	4489
June	1st to 10th	Day	39% 10% 16% 19% 15% 1	2470
	11th to 20th	Day	36% 10% 14% 24% 15% 2	2470
	21st to end	Day	41% 11% 16% 20% 11% 1	2470
July	1st to 10th	Day	45% 10% 21% 18% 5% 1	4056
	11th to 20th	Day	48% 10% 16% 19% 7% 1	4051
	21st to end	Day	53% 8% 13% 19% 6% 1	4325
August	1st to 10th	Day	20% 7% 14% 31% 26% 1	4028
	11th to 20th	Day	25% 8% 22% 36% 8% 1	3765
	21st to end	Day	41% 7% 15% 18% 18% 1	4179
September	1st to 10th	Day	39% 10% 14% 17% 14% 6%	2280
	11th to 20th	Day	40% 9% 14% 13% 18% 6%	2185
	21st to end	Day	33% 6% 10% 22% 19% 11%	2024
October	1st to 10th	Day	18% 4 5% 14% 23% 36%	3160
	11th to 20th	Day	19% 3 5% 16% 31% 26%	3140
	21st to end	Day	27% 3 4 13% 38% 16%	3428
November	1st to 10th	Day	35% 5% 8% 17% 24% 10%	1898
	11th to 20th	Day	35% 4 6% 14% 28% 12%	1900
	21st to end	Day	43% 4 8% 16% 22% 9%	1900
December	1st to 10th	Day	41% 5% 10% 19% 17% 8%	1782
	11th to 20th	Day	45% 5% 6% 12% 25% 7%	2159
	21st to end	Day	44% 4 6% 14% 27% 5%	3135
January	1st to 10th	Night	38% 5% 6% 17% 27% 7%	4108
	11th to 20th	Night	37% 4 7% 20% 23% 9%	4120
	21st to end	Night	47% 4 6% 16% 18% 8%	4532
February	1st to 10th	Night	43% 4 8% 17% 18% 11%	2470
	11th to 20th	Night	44% 4 6% 16% 20% 10%	2228
	21st to end	Night	48% 6% 7% 11% 15% 14%	1727
March	1st to 10th	Night	52% 7% 8% 13% 14% 6%	3419
	11th to 20th	Night	48% 7% 9% 14% 18% 5%	3480
	21st to end	Night	39% 7% 10% 16% 23% 5%	3817
April	1st to 10th	Night	36% 6% 11% 20% 16% 11%	1971
	11th to 20th	Night	39% 7% 9% 17% 17% 12%	1875
	21st to end	Night	32% 6% 11% 19% 25% 6%	1900
May	1st to 10th	Night	43% 10% 13% 16% 14% 4	3160
	11th to 20th	Night	38% 8% 11% 17% 22% 3	3019
	21st to end	Night	35% 11% 19% 22% 12% 1	3099
June	1st to 10th	Night	28% 10% 19% 24% 19% 1	1710
	11th to 20th	Night	22% 8% 19% 32% 15% 4	1710
	21st to end	Night	27% 9% 20% 28% 15% 1	1710
July	1st to 10th	Night	36% 9% 30% 19% 5% 1	2805
	11th to 20th	Night	35% 10% 25% 23% 6%	2796
	21st to end	Night	44% 9% 21% 19% 6% 1	2999
August	1st to 10th	Night	12% 6% 18% 35% 28% 1	2882
	11th to 20th	Night	21% 8% 26% 37% 8% 1	3130
	21st to end	Night	37% 9% 16% 18% 17% 2	3476
September	1st to 10th	Night	30% 10% 18% 20% 14% 8%	1900
	11th to 20th	Night	36% 9% 12% 17% 17% 8%	1989
	21st to end	Night	28% 6% 10% 22% 21% 13%	2137
October	1st to 10th	Night	17% 4 7% 14% 20% 37%	3800
	11th to 20th	Night	17% 3 5% 18% 30% 28%	3779
	21st to end	Night	21% 3 6% 15% 36% 19%	4120
November	1st to 10th	Night	30% 4 10% 18% 26% 12%	2280
	11th to 20th	Night	32% 5% 9% 15% 25% 14%	2280
	21st to end	Night	42% 4 7% 15% 23% 10%	2280
December	1st to 10th	Night	41% 5% 10% 17% 20% 7%	2394
	11th to 20th	Night	42% 4 6% 12% 24% 12%	3037
	21st to end	Night	41% 5% 7% 17% 23% 7%	4532

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	23% 18% 40% 14% 4 1	270
	11th to 20th	Day	24% 19% 36% 15% 5%	270
	21st to end	Day	28% 20% 32% 17% 3	297
February	1st to 10th	Day	26% 18% 35% 15% 6% 1	270
	11th to 20th	Day	35% 16% 34% 14% 1	270
	21st to end	Day	32% 24% 33% 11% 1	225
March	1st to 10th	Day	25% 18% 34% 17% 6%	270
	11th to 20th	Day	19% 20% 38% 20% 3	270
	21st to end	Day	18% 24% 37% 18% 4	297
April	1st to 10th	Day	21% 17% 35% 22% 5%	389
	11th to 20th	Day	26% 13% 28% 21% 10% 1	452
	21st to end	Day	14% 13% 33% 28% 10% 2	460
May	1st to 10th	Day	16% 11% 35% 26% 11% 1	463
	11th to 20th	Day	14% 5% 27% 31% 18% 5%	546
	21st to end	Day	9% 5% 27% 33% 20% 6%	734
June	1st to 10th	Day	9% 3 16% 35% 27% 10%	680
	11th to 20th	Day	8% 3 15% 38% 28% 8%	680
	21st to end	Day	8% 2 12% 28% 36% 14%	680
July	1st to 10th	Day	8% 2 11% 27% 38% 14%	671
	11th to 20th	Day	7% 2 5% 27% 43% 16%	668
	21st to end	Day	9% 1 6% 28% 42% 14%	739
August	1st to 10th	Day	4 1 6% 24% 45% 20%	640
	11th to 20th	Day	6% 2 4 22% 46% 20%	479
	21st to end	Day	12% 2 8% 19% 36% 23%	539
September	1st to 10th	Day	10% 2 7% 25% 40% 16%	490
	11th to 20th	Day	13% 3 10% 26% 32% 16%	395
	21st to end	Day	13% 3 13% 29% 31% 12%	300
October	1st to 10th	Day	8% 3 19% 43% 21% 6%	300
	11th to 20th	Day	9% 5% 33% 26% 21% 6%	300
	21st to end	Day	21% 8% 29% 25% 11% 5%	330
November	1st to 10th	Day	15% 9% 27% 33% 12% 4	282
	11th to 20th	Day	16% 12% 37% 26% 8% 2	270
	21st to end	Day	21% 16% 35% 20% 6% 2	270
December	1st to 10th	Day	19% 11% 37% 21% 8% 3	270
	11th to 20th	Day	24% 13% 35% 22% 5%	270
	21st to end	Day	23% 15% 39% 18% 3 1	297
January	1st to 10th	Night	20% 14% 35% 24% 7%	950
	11th to 20th	Night	21% 14% 32% 25% 7%	950
	21st to end	Night	25% 11% 34% 27% 3	1045
February	1st to 10th	Night	21% 14% 34% 27% 3	950
	11th to 20th	Night	24% 17% 34% 22% 3	752
	21st to end	Night	24% 18% 35% 20% 2	471
March	1st to 10th	Night	22% 12% 32% 29% 5%	570
	11th to 20th	Night	20% 12% 33% 29% 5% 1	570
	21st to end	Night	17% 9% 41% 25% 7%	627
April	1st to 10th	Night	15% 11% 42% 26% 6%	570
	11th to 20th	Night	18% 12% 35% 23% 11%	563
	21st to end	Night	12% 10% 38% 29% 10% 1	570
May	1st to 10th	Night	14% 8% 36% 32% 10% 1	570
	11th to 20th	Night	11% 5% 30% 34% 17% 3	561
	21st to end	Night	7% 4 25% 38% 23% 4	617
June	1st to 10th	Night	7% 2 14% 41% 32% 4	570
	11th to 20th	Night	5% 3 17% 46% 27% 3	570
	21st to end	Night	7% 2 10% 38% 35% 8%	570
July	1st to 10th	Night	6% 1 8% 41% 36% 9%	555
	11th to 20th	Night	4 1 6% 40% 38% 10%	552
	21st to end	Night	7% 1 6% 39% 39% 8%	624
August	1st to 10th	Night	3 1 5% 37% 46% 9%	567
	11th to 20th	Night	6% 7% 38% 41% 9%	564
	21st to end	Night	9% 2 9% 29% 40% 11%	627
September	1st to 10th	Night	8% 1 7% 34% 42% 8%	570
	11th to 20th	Night	13% 2 10% 27% 41% 8%	570
	21st to end	Night	12% 2 11% 32% 36% 5%	617
October	1st to 10th	Night	8% 2 14% 40% 31% 6%	760
	11th to 20th	Night	11% 6% 23% 38% 19% 3	760
	21st to end	Night	14% 7% 23% 36% 17% 2	836
November	1st to 10th	Night	12% 6% 26% 34% 21% 2	760
	11th to 20th	Night	13% 9% 27% 36% 15%	760
	21st to end	Night	19% 11% 30% 27% 12% 1	760
December	1st to 10th	Night	23% 11% 28% 29% 9%	874
	11th to 20th	Night	23% 11% 29% 29% 6% 1	950
	21st to end	Night	22% 13% 28% 31% 6%	1045

Page generated at 2024-11-03 01:11:20. Version ac07

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